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parameter.go
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parameter.go
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package parameter
import (
"net/url"
"regexp"
"strconv"
"strings"
)
type Parameters struct {
Page string
PageSize string
SortField string
Columns []string
SortType string
Fields map[string]string
}
func GetParam(values url.Values) Parameters {
page := GetDefault(values, "__page", "1")
pageSize := GetDefault(values, "__pageSize", "10")
sortField := GetDefault(values, "__sort", "id")
sortType := GetDefault(values, "__sort_type", "desc")
columns := GetDefault(values, "__columns", "")
fields := make(map[string]string)
for key, value := range values {
if key != "__page" &&
key != "__pageSize" &&
key != "__sort" &&
key != "__columns" &&
key != "__sort_type" &&
key != "__prefix" &&
key != "_pjax" &&
value[0] != "" {
if key == "__sort_type" {
if value[0] != "desc" && value[0] != "asc" {
fields[key] = "desc"
}
} else {
fields[key] = value[0]
}
}
}
columnsArr := make([]string, 0)
if columns != "" {
columnsArr = strings.Split(columns, ",")
}
return Parameters{
Page: page,
PageSize: pageSize,
SortField: sortField,
SortType: sortType,
Fields: fields,
Columns: columnsArr,
}
}
func GetParamFromUrl(value string) Parameters {
prevUrlArr := strings.Split(value, "?")
paramArr := strings.Split(prevUrlArr[1], "&")
var (
page = "1"
pageSize = "10"
sortField = "id"
sortType = "desc"
columns = make([]string, 0)
)
for i := 0; i < len(paramArr); i++ {
arr := strings.Split(paramArr[i], "=")
switch arr[0] {
case "__pageSize":
pageSize = arr[1]
case "__page":
page = arr[1]
case "__sort":
sortField = arr[1]
case "__sort_type":
sortType = arr[1]
case "__columns":
columns = strings.Split(arr[1], ",")
}
}
return Parameters{
Page: page,
PageSize: pageSize,
SortField: sortField,
SortType: sortType,
Columns: columns,
}
}
func (param Parameters) SetPage(page string) Parameters {
param.Page = page
return param
}
func (param Parameters) GetRouteParamStr() string {
return "?__page=" + param.Page + param.GetFixedParamStr()
}
func (param Parameters) GetRouteParamStrWithoutId() string {
return regexp.MustCompile(`&id=[0-9]+`).ReplaceAllString(param.GetRouteParamStr(), "")
}
func (param Parameters) GetRouteParamStrWithoutPageSize() string {
return "?__page=" + param.Page + param.GetFixedParamStrWithoutPageSize()
}
func (param Parameters) GetLastPageRouteParamStr() string {
pageInt, _ := strconv.Atoi(param.Page)
return "?__page=" + strconv.Itoa(pageInt-1) + param.GetFixedParamStr()
}
func (param Parameters) GetNextPageRouteParamStr() string {
pageInt, _ := strconv.Atoi(param.Page)
return "?__page=" + strconv.Itoa(pageInt+1) + param.GetFixedParamStr()
}
func (param Parameters) GetFixedParamStrWithoutPageSize() string {
str := "&"
for key, value := range param.Fields {
str += key + "=" + value + "&"
}
if len(param.Columns) > 0 {
return "&__columns=" + strings.Join(param.Columns, ",") + "&__sort=" + param.SortField +
"&__sort_type=" + param.SortType + str[:len(str)-1]
} else {
return "&__sort=" + param.SortField + "&__sort_type=" + param.SortType + str[:len(str)-1]
}
}
func (param Parameters) GetFixedParamStr() string {
str := "&"
for key, value := range param.Fields {
str += key + "=" + value + "&"
}
if len(param.Columns) > 0 {
return "&__columns=" + strings.Join(param.Columns, ",") + "&__pageSize=" + param.PageSize + "&__sort=" +
param.SortField + "&__sort_type=" + param.SortType + str[:len(str)-1]
} else {
return "&__pageSize=" + param.PageSize + "&__sort=" +
param.SortField + "&__sort_type=" + param.SortType + str[:len(str)-1]
}
}
func GetDefault(values url.Values, key, def string) string {
value := values.Get(key)
if value == "" {
return def
}
return value
}